For your Valentine
A small diamond as a token of your love.
Though it might just squish her. As Scott at AMCGLTD notes:
At that density and size, it should be noted, the thing has a gravitational field about three thousand times stronger than the earth’s.
And Michael at Discount Blogger reports that on hearing the news:
… the simultaneous orgasm experienced by worldwide employees of De Beers very nearly registered on the Richter scale.